25K-3T / 33K-3T grid-tied string inverter 25–33 kW
Country: Germany · Model: 25K-3T / 33K-3T
A pair of grid-tied string inverters of 25 and 33 kW (28 and 37 kVA) with three MPP trackers of two inputs each. They are installed at commercial solar plants and at plants undergoing repowering, because they connect to the same monitoring portal where older generations of this manufacturer's inverters already work.
- Rated power
- 25 kW (28 kVA) / 33 kW (37 kVA)
- MPP trackers
- 3 (2 inputs each)
- Max. PV power
- 37.5 / 49.5 kWp
- DC voltage
- max. 1100 V; MPPT 480–850 V
Technical specifications
| Rated power | 25 kW (28 kVA) / 33 kW (37 kVA) |
|---|---|
| MPP trackers | 3 (2 inputs each) |
| Max. PV power | 37.5 / 49.5 kWp |
| DC voltage | max. 1100 V; MPPT 480–850 V |
| Grid | 3P/N/PE 230/400 V |
| Efficiency | max. 98.6 %, European 98.2 % |
| Protection rating | IP65, −30…+60 °C |
| Dimensions / weight | 480×585×220 mm, 36 kg |
| Standards | EN 50549-1, VDE-AR-N 4105, VDE-AR-N 4110, IEC 62109-1/2 |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
Both models are built in the same 480×585×220 mm case weighing 36 kg and differ only in the power section. The 25K-3T takes an array of up to 37.5 kWp, the 33K-3T up to 49.5 kWp. The DC voltage limit is 1100 V and the working window of the trackers is 480–850 V. The output is three-phase, 3P/N/PE 230/400 V, with a maximum efficiency of 98.6 % and a European efficiency of 98.2 %. The IP65 protection rating and the range from −30 to +60 °C make it possible to hang the inverter outdoors under the modules or on the north wall of a building. The inverter is certified to EN 50549-1, IEC 62109-1/2 and VDE-AR-N 4105, and compliance with VDE-AR-N 4110 opens the way to plants connected at medium voltage.
How to choose
Between the 25K-3T and 33K-3T the choice is made by the peak power of the array, which must not exceed 37.5 or 49.5 kWp respectively. Six inputs on three trackers cover a roof with three orientations, two strings for each. For an array of up to 30 kWp the 20K-3T is enough, and 75 kWp are already handled by the 50K-4T with four trackers.
Request a price and lead time
25K-3T / 33K-3T grid-tied string inverter 25–33 kW. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
Can the 33K-3T be combined with the old inverters of the plant in one monitoring system?
Yes, the inverter works in the common monitoring portal with older generations of this manufacturer's units. During repowering only the failed units are replaced, and the data of the whole plant stays in one place.
What peak PV array power do the 25K-3T and 33K-3T handle?
The smaller model is designed for 37.5 kWp, the larger for 49.5 kWp. In both cases this is about one and a half times the inverter rating.
In what temperature range does the 25K-3T inverter work?
From −30 to +60 °C with an IP65 protection rating. It needs neither an insulated cabinet nor a rain canopy.
How many module strings does the 33K-3T accept?
Six, two for each of the three MPP trackers. The operating string voltage must fit in 480–850 V, and the open-circuit voltage must not exceed 1100 V.
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Need a price, lead time or replacement?
Send us a request and we will confirm the configuration, lead time and delivery terms. We reply by email.